Black Ops 2 Uprising

A promotional card found at Best Buy has leaked the next Black Ops 2 DLC - Uprising, as coming out on  Tues. April 16th.  It looks to include 4 multiplayer maps : Vertigo, Encore, Magma, and Studio; along with something called Mob of the Dead which sounds like zombies only.  It does not look to have any gun dlc with it. source